Investigating the Effect of Episodic Stellar Activity on Planetary Evolution
Student: Logan Oxener
Major: Astronomy
Mentors: Dr. Joseph Carson
Department: Physics and Astronomy
Investigating the Effect of Episodic Stellar Activity on Planetary Evolution
The relationship between short burst stellar activity, such as solar flares or magnetic storms, and the development of planets has yet to be fully explored. Such short-term stellar activity, which has been previously shown to cause increases in star brightness by factors of a 100 or more (Kowalski et al. 2009), can have major impacts on an orbiting planet's atmosphere, including properties that are important for planet habitability. To help investigate the significance of this phenomenon, we collected new telescope data, via remote observations on 1-meter telescopes in South Africa and Australia, and also downloaded publicly available archival data, to monitor changes in visual brightness of three young, nearby stars. The targets were all K and M type stars, which are the most prevalent type of stars in the universe. The properties of K and M type stars may therefore have wide implications for the likelihood of life in the universe. To analyze the data, we used our own developed software to measure brightness changes and to produce plots of photometry versus time. The results of our analysis will be provided as inputs to ongoing computer simulations (see presentation by A. Nida), which predict how changes in star brightness impact the atmospheres of hypothetical orbiting planets.